make linter happy

internal/usbgadget/ethernet.go

@@ -1,30 +0,0 @@
-package usbgadget
-
-// var ethernetConfig = gadgetConfigItem{
-// 	order:      3100,
-// 	device:     "ecm.usb0",
-// 	path:       []string{"functions", "ecm.usb0"},
-// 	configPath: []string{"ecm.usb0"},
-// 	attrs: gadgetAttributes{
-// 		"host_addr": "12:34:56:78:90:AB",
-// 		"dev_addr":  "12:34:56:78:90:AC",
-// 	},
-// }
-
-var rndisConfig = gadgetConfigItem{
-	// https://stackoverflow.com/questions/12154087/rndis-composite-device-cannot-start
-	// it has to be the first or second function, so give it a high priority here :-(
-	order:      990,
-	device:     "rndis.usb0",
-	path:       []string{"functions", "rndis.usb0"},
-	configPath: []string{"rndis.usb0"},
-	// osDescAttrs: gadgetAttributes{
-	// 	"use":           "1",
-	// 	"b_vendor_code": "0xcd",
-	// 	"qw_sign":       "MSFT100",
-	// },
-	// featureDescAttrs: gadgetAttributes{
-	// 	"compatible_id":    "RNDIS",
-	// 	"subcompatible_id": "5162001",
-	// },
-}

internal/usbgadget/log.go

@@ -1,12 +1,12 @@
 package usbgadget
 
 import (
-	"fmt"
+	"errors"
 )
 
 func (u *UsbGadget) logWarn(msg string, err error) error {
 	if err == nil {
-		err = fmt.Errorf(msg)
+		err = errors.New(msg)
 	}
 	if u.strictMode {
 		return err
@@ -17,7 +17,7 @@ func (u *UsbGadget) logWarn(msg string, err error) error {
 
 func (u *UsbGadget) logError(msg string, err error) error {
 	if err == nil {
-		err = fmt.Errorf(msg)
+		err = errors.New(msg)
 	}
 	if u.strictMode {
 		return err

internal/usbgadget/utils.go

@@ -3,7 +3,6 @@ package usbgadget
 import (
 	"bytes"
 	"fmt"
-	"os"
 	"path/filepath"
 	"strconv"
 	"strings"
@@ -22,26 +21,6 @@ func joinPath(basePath string, paths []string) string {
 	return filepath.Join(pathArr...)
 }
 
-func ensureSymlink(linkPath string, target string) error {
-	if _, err := os.Lstat(linkPath); err == nil {
-		currentTarget, err := os.Readlink(linkPath)
-		if err != nil || currentTarget != target {
-			err = os.Remove(linkPath)
-			if err != nil {
-				return fmt.Errorf("failed to remove existing symlink %s: %w", linkPath, err)
-			}
-		}
-	} else if !os.IsNotExist(err) {
-		return fmt.Errorf("failed to check if symlink exists: %w", err)
-	}
-
-	if err := os.Symlink(target, linkPath); err != nil {
-		return fmt.Errorf("failed to create symlink from %s to %s: %w", linkPath, target, err)
-	}
-
-	return nil
-}
-
 func hexToDecimal(hex string) (int64, error) {
 	decimal, err := strconv.ParseInt(hex, 16, 64)
 	if err != nil {